3. Apple fixing flaws: Apple has confirmed all its Mac systems and iOS devices are affected by two recently disclosed processor flaws called Spectre and Meltdown.

In an announcement on Thursday, Apple said it had released mitigations to defend against Meltdown in iOS 11.2, macOS 10.13.2, and tvOS 11.2. It will release mitigations in Safari to defend against the Spectre bug "in the coming days," the release said.

"There are no known exploits impacting customers at this time," Apple said, echoing what other companies and security researchers have said.

4. Toshiba's nuclear option: Toshiba's disastrous foray into the U.S. nuclear business is coming to an end.

The company is selling Westinghouse, its beleaguered U.S. nuclear unit, for $4.6 billion to Canadian investment firm, Brookfield Business Partners.

The collapse of Westinghouse cost Toshiba some $6.4 billion, forcing the storied Japanese conglomerate to admit its financial future was in peril. It has been offloading assets in order to survive.

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